Arctic blast sends temperatures tumbling as freezing winds erupt into thundery hailstorms
Today is likely to be the coldest day of the week
Weather in Britain set for thundery deluge after coldest May night for five years
Temperatures in the Highlands dropped below -6C
UK weather: Britons to bask in 48 hours of sunshine before sweeping 'anticyclonic' pressure hits
Daytime temperatures through the middle of the week in parts will hit the mid-20Cs before tumbling overnight, she warned
